Bellus-Kaiserfisch-Guide

The bellus (Genicanthus bellus) is a popular reef aquarium fish reaching 7 in (18 cm) in the home aquarium. Originating from the Indo-Pacific region, it is rated as moderate difficulty and is generally considered reef safe. Its peaceful temperament makes it suitable for community reef setups when proper care guidelines are followed.

Steckbrief


Scientific name	Genicanthus bellus
Max size	7 in (18 cm)
Min tank size	75 gal (285 L)
Temperament	Peaceful
Diet	Omnivore (planktivore)
Reef safe	Yes
Care level	Moderate
Origin	Indo-Pacific

Überblick

The following sections detail exactly how to keep this species thriving in a saltwater reef environment.

Beckenanforderungen

Provide a minimum tank size of 75 gal (285 L) with ample live rock for grazing, hiding, and territory. Maintain standard reef parameters: temperature 75–80 °F, pH 8.0–8.4, salinity 1.024–1.026, alkalinity 8–11 dKH. This species is peaceful enough to add at any point in the stocking order. Moderate flow and lighting that suits your coral mix work well.

Wasserparameter

Maintain standard reef aquarium parameters for long-term health:

Temperature: 75–80 °F (24–27 °C)
pH: 8.0–8.4
Salinity: 1.024–1.026 sg
Alkalinity: 8–11 dKH
Ammonia / Nitrite: 0 ppm
Nitrate: < 20 ppm (lower is better for a reef)

Stability is more important than hitting a specific number. Avoid sudden swings in any parameter.

Ernährung und Fütterung

Feed a omnivore (planktivore) diet consisting of high-quality marine pellets, frozen Mysis shrimp, and occasional algae sheets. Feed 1–2 times daily in small amounts consumed within two minutes. Vary the diet to ensure complete nutrition and vibrant coloration.

Verhalten und Verträglichkeit

This species has a peaceful temperament and coexists well with most reef-safe community fish including clownfish, gobies, and cardinalfish. Fully reef safe with corals, clams, and invertebrates.

Zucht

Breeding Genicanthus bellus in captivity is challenging and rarely achieved. Sexing can be difficult without observing spawning behavior.

Tipps für den Erfolg

Quarantine for at least 2–4 weeks before adding to your display tank.
Provide 75 gal (285 L) minimum—larger is always better for long-term health.
Vary between frozen, pellet, and live foods for optimal nutrition.
Maintain stable water parameters—sudden changes cause stress and disease susceptibility.
Observe the fish eating at the store before purchasing to ensure it is feeding well.

Häufig gestellte Fragen

What tank size does a Genicanthus bellus need?

The minimum recommended tank size is 75 gal (285 L). This provides adequate swimming space, territory, and stable water volume. Larger tanks are always better, especially for active swimmers.

Is this fish reef safe?

Yes, this species is considered fully reef safe and will not harm corals, clams, or invertebrates.

What does this fish eat?

This is a omnivore (planktivore) species. Offer a mix of meaty and plant-based foods: pellets, frozen Mysis, brine shrimp, and occasional nori.